JP2010002377A - Impact recording sensor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an impact recording sensor capable of detecting and recording an impact, even when a packing box or an article stored in the box has any shape, or when the impact is applied to a box from any direction, only by disposing the sensor in the box. <P>SOLUTION: This impact recording sensor 10 is constituted of a pressure-sensitive member 13 comprising a coloring agent capsule and a resin material formed by blending a development agent into a resin composition, a weight 15 whose periphery is surrounded three-dimentionally by the pressure-sensitive member 13, and a container 11 having a shape covering the pressure-sensitive member 13 from the outside. When the impact recording sensor 10 receives an impact, in any case where a relative moving direction of the weight 15 includes a displacement component in any direction of orthogonal triaxial directions, the pressure-sensitive member 13 is sandwiched between an inner wall of the container 11 and the weight 15 and compressed, and the coloring agent capsule is broken, and the pressure-sensitive member 13 develops color. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an impact recording sensor capable of detecting and recording that an impact has been applied.

Conventionally, as a device that detects and records the impact of a precision device, pressure sensitive paper is provided inside the precision device, and the pressure sensitive paper is colored when impact is applied to the precision device. (See Patent Document 1 and Patent Document 2). In addition, there is also a type in which a transport container used for transporting a product is configured with a member that develops a color by impact, and that the impact on the transport container is detected and recorded by the coloring action of the member (see Patent Document 3). reference.).
JP 2003-143275 A JP 2004-184229 A JP 2006-323740 A

  By the way, in the precision instrument as described above, the impact causing the damage may be applied at a stage before packing the precision instrument (for example, during the manufacturing), or a stage after packing the precision instrument (for example, It may be added during transportation).

  However, in the techniques described in Patent Document 1 and Patent Document 2, since pressure sensitive paper is only pasted inside the precision instrument, the color is generated regardless of whether the impact is applied before or after packing. It is difficult to judge when the impact is applied.

  In addition to the inside of the precision instrument, pressure sensitive paper can be attached to the inside of the packaging box, but it is not easy to color such pressure sensitive paper. Specifically, even if the pressure-sensitive paper is first attached to the inside of the packaging box, depending on the application location, the article stored in the box collides with the application location of the pressure-sensitive paper depending on the application location. Whether or not it is not certain. Second, since the shape of the article varies, even when an article of a specific shape comes into contact with a specific part of a packaging box when receiving an impact, the article of another shape does not always come into contact with the specific part. Absent.

  Third, since the direction of receiving an impact varies, even if the article comes into contact with the packaging box when the impact is received from one direction, the article is a packaging box when the impact is received from another direction. Not necessarily in contact with. Therefore, there is a problem that the impact applied to the packing box cannot be detected properly only by sticking the pressure sensitive paper inside the packing box.

  In addition, when the packaging box is configured with a member that develops color by impact using the technique described in Patent Document 3, the packaging box is colored, but the packaging box itself is made of a special material. There was a problem that existing boxes could not be used because they would be manufactured.

  The present invention has been made to solve the above-described problems, and the purpose of the present invention is to ensure that the packaging box and the articles stored in the box have any shape. It is an object of the present invention to provide an impact recording sensor that can detect and record an impact applied after packing, regardless of the direction in which the impact is applied to the box.

Hereinafter, the configuration adopted to achieve the above object in the present invention will be described.
The impact recording sensor of the present invention is a sensation made of a resin material in which at least one of a color former and a color developer that develops color upon contact is encapsulated in a microcapsule and both are blended in a matrix resin composition. When a pressure member and an external impact are applied, the pressure sensitive member moves relative to the pressure sensitive member to compress the pressure sensitive member, thereby destroying the microcapsules in the pressure sensitive member and causing the pressure sensitive member to develop color. The pressure-sensitive member is arranged at a position that surrounds the weight three-dimensionally, and the relative movement direction of the weight when subjected to an impact is a displacement component in either of the three orthogonal axes The pressure-sensitive member is compressed by the weight even if it includes the above.

  According to the impact recording sensor of the present invention, in addition to the pressure-sensitive member having a coloring function, the weight as described above is also provided, and when receiving an impact, the pressure-sensitive member is compressed by the weight. Therefore, regardless of the shape of the packing box and the items stored in the box, the impact recording sensor is simply installed in the box to detect and record the impact. be able to. In other words, unlike the simple application of pressure-sensitive paper, taking into account the relationship with the member that contacts the pressure-sensitive paper, it is troublesome to apply the pressure-sensitive paper by strictly selecting the location where the pressure-sensitive paper is surely impacted. Therefore, the degree of freedom regarding the mounting location of the impact recording sensor is remarkably increased.

  In addition, in this impact recording sensor, since the pressure-sensitive member is disposed at a position that surrounds the periphery of the weight in a three-dimensional manner, the relative movement direction of the weight when subjected to the impact is either of the three orthogonal axes. Even when a displacement component is included, the pressure-sensitive member is compressed by the weight. Therefore, when the impact recording sensor is disposed in the box, the weight compresses the pressure-sensitive member no matter what direction the impact is applied to the packaging box, so that the impact is received from a specific direction. Unlike some cases where only some members abut against the pressure sensitive paper, it is possible to reliably detect the impact and leave it in the record.

Next, in the impact recording sensor of the present invention, it is preferable that the pressure-sensitive member has such a light transmittance that a colored state can be observed from the outside.
By adopting such a configuration, it is possible to observe not only the color development on the surface of the pressure-sensitive member but also the color development state inside the pressure-sensitive member. Therefore, unlike the pressure-sensitive paper that can observe only the color development on the surface, it is possible to estimate the direction in which the impact has propagated from the color development state from the surface to the inside of the pressure-sensitive member.

  Next, the impact recording sensor of the present invention is provided with a container that has a light-transmitting property that allows the color development state of the pressure-sensitive member to be observed from the outside in a form that covers the outside of the pressure-sensitive member. Sometimes, it is preferable that the pressure sensitive member is sandwiched between the container and the weight and compressed.

  If such a container is provided, even if the pressure sensitive member tries to move away from the weight as the weight moves, such movement is blocked by the container. It is compressed in a sandwiched form. Therefore, the pressure-sensitive member can be made to develop color more easily than those not provided with such a container. In addition, since the container has such light transmittance that the pressure-sensitive member can be observed from the outside, the container does not make it difficult to confirm the color state.

[First Embodiment]
FIG. 1A is a perspective view of an impact recording sensor 10 described as the first embodiment, and FIG. 1B is a cross-sectional view of the impact recording sensor 10.

The impact recording sensor 10 includes a container 11, a pressure sensitive member 13, and a weight 15 that is a steel ball. The container 11 is a rectangular parallelepiped container made of highly transparent acrylic resin.
The pressure-sensitive member 13 is affixed to the inside of each surface of the rectangular parallelepiped container 11, and an internal space surrounded by the pressure-sensitive member 13 is formed inside the impact recording sensor 10. The pressure-sensitive member 13 is made of an extremely low hardness elastomeric material (gel-like resin material), and has a light transmittance that allows a colored state to be observed from the outside.

  Specifically, in this embodiment, the material forming the pressure-sensitive member 13 is a styrenic elastomer (YMG-80, manufactured by Kitagawa Kogyo Co., Ltd.) in a heated and melted state, and a color former capsule (average particle size of 20 to 30 μm). Melamine resin microcapsules) and a developer (a compound that develops color by a chemical reaction with the color former) and a developer.

The weight 15 is disposed in the internal space surrounded by the pressure-sensitive member 13 and can move in any direction of the three orthogonal axes.
Next, the function of the impact recording sensor 10 will be described by taking as an example the case where the impact recording sensor 10 configured as described above is disposed inside a packaging box containing articles.

  When the packaging box to which the impact recording sensor 10 is attached receives an impact during transportation, the impact is also transmitted to the impact recording sensor 10. At this time, even if the article stored in the box does not contact the impact recording sensor 10, the pressure-sensitive member 13 is sandwiched between the inner wall of the container 11 and the weight 15 and compressed.

  When the pressure-sensitive member 13 is compressed, the color developer capsule is broken at a portion where a stress that is strong enough to cause destruction of the color developer capsule is brought into contact with the color developer and the developer. The member 13 develops color.

  In addition, since the weight 15 is surrounded by the pressure-sensitive member 13, the relative movement direction of the weight 15 when the impact recording sensor 10 receives an impact includes a displacement component in any of the three orthogonal axes. Even if it exists, the pressure-sensitive member 13 is sandwiched between the inner wall of the container 11 and the weight 15 and compressed.

  Therefore, with such an impact recording sensor 10, the pressure-sensitive member 13 can be colored when subjected to an impact, regardless of where the impact recording sensor 10 is mounted inside the box. .

  In addition, with such an impact recording sensor 10, the weight 15 compresses the pressure-sensitive member 13 regardless of the direction from which the shock is applied. In contrast, it is possible to reliably detect that an impact has been applied and to record it.

  Further, since the container 11 has high transparency, the container 11 does not make it difficult to confirm the color development state of the pressure-sensitive member 13. Furthermore, since the pressure-sensitive member 13 has such a light transmittance that the color development state can be observed from the outside, the color development state inside the pressure-sensitive member 13 can be confirmed.

[Second Embodiment]
FIG. 2A is a perspective view of an impact recording sensor 20 described as the second embodiment, and FIG. 2B is a cross-sectional view of the impact recording sensor 20. The impact recording sensor 20 includes a pressure sensitive member 23 and a weight 15. The pressure sensitive member 23 and the weight 15 are made of the same material as that of the first embodiment described above.

  The pressure-sensitive member 23 is a member formed by molding the above-described elastomer material into a rectangular parallelepiped shape. The weight 15 is enclosed in the approximate center inside the pressure-sensitive member 23 in a state where there is no internal space like the impact recording sensor 10 of the first embodiment.

  Further, unlike the impact recording sensor 10 of the first embodiment, the impact recording sensor 20 does not include the container 11 and the pressure-sensitive member 23 is exposed on the surface of the impact recording sensor 20. By adopting such a structure not including the container 11, the impact recording sensor 20 can be used as a cushioning material. That is, since the elastomer material forming the pressure-sensitive member 23 has excellent characteristics as a cushioning material, the impact recording sensor 20 can also be used as a cushioning material.

  Even in the impact recording sensor 20 configured as described above, when the packaging box to which the impact recording sensor 20 is attached receives an impact during transportation, the impact is transmitted to the impact recording sensor 20, so that the impact force is sensed by the inertial force of the weight 15. The pressure member 23 is compressed to develop color. In addition, since the weight 15 is enclosed in the pressure-sensitive member 23, the pressure-sensitive member can be used regardless of the relative movement direction of the weight 15 when the impact recording sensor 20 receives an impact. 13 is compressed to develop color. Therefore, it is possible to know that an impact has been applied to the packaging box by the color of the impact recording sensor 20.

  Further, since the impact recording sensor 20 can also be used as a cushioning material, the impact recording sensor 20 is interposed between the packing box and the article housed therein, so that the inside of the box can be provided. It is also possible to protect the stored articles from impact.

[Other Embodiments]
As mentioned above, although embodiment of this invention was described, this invention is not limited to said specific one Embodiment, In addition, it can implement with a various form.

  For example, in the impact recording sensor of the above-described embodiment, the case has been described in which the box for packing an article is attached to the box when transported, and the impact received by the box is detected and recorded, but the present invention is not limited thereto. It can be used by being attached to various things that require detection and recording of impact.

In the impact recording sensor of the above-described embodiment, the steel sphere is exemplified as the weight. However, the shape of the weight is not limited to the spherical shape.
For example, the impact recording sensor 30 shown in FIG. 3 includes the container 11 and the pressure-sensitive member 13 similar to the impact recording sensor 10 illustrated in the first embodiment, but the shape of the weight 35 is the weight of the first embodiment. Unlike 15, it is a three-dimensional star-shaped steel member.

  Even in such an impact recording sensor 30, the coloring mechanism is the same as that of the above-described impact recording sensor 10, but when the pressure-sensitive member 13 is sandwiched between the star-shaped apex of the weight 35 and the container 11, it has a spherical shape. As compared with the case where the pressure-sensitive member 13 is compressed by the weight 15, the stress is concentrated in a narrow range of the pressure-sensitive member 13 even if the same level of impact is applied. Therefore, the pressure-sensitive member 13 can be colored even when receiving a smaller impact.

Note that the material, weight, and shape of the weight may be anything as long as the pressure-sensitive member can be compressed.
Further, in the above-described impact recording sensor, as the color former and developer, for example, known electron accepting developer and electron donating color former generally used in pressure-sensitive paper can be used. .

  As specific color formers, for example, triarylmethane compounds, diphenylmethane compounds, xanthene compounds, thiazine compounds, spiro compounds and the like can be used. More specifically, 3,3-bis (p-dimethylaminophenyl) -6-dimethylaminophthalide, 3- (1,2-dimethylindol-3-yl) phthalide, 3- (p-dimethylaminophenyl) ) -3- (2-Methylindol-3-yl) phthalide, 3,3-bis- (1,2-dimethylindol-3-yl) -5-dimethylaminophthalide, 3,3-bis- (9 -Ethylcarbazol-3-yl) -5-dimethylaminophthalide, 4,4-bis-dimethylaminobenzhydrin benzyl ether, N-halophenylleucooramine, N-2,4,5-trichlorophenylleucoora Min etc., Rhodamine B-anilinolactam, Rhodamine Bp-nitroanilinolactam, 3-diethylamino-7-dibenzylaminofluorane, 3 Diethylamino-7-phenylfluorane, 3-diethylamino-7-3,4-dichloroanilinofluorane, 3-ethyl-tolylamino-6-methyl-7-phenethylfluorane, 3-diethylamino-7- (4 -Nitroanilino) fluorane, benzoyl leucomethylene blue, p-nitrobenzoyl leucomethylene blue, 3-methyl-spiro-dinaphthobirane, 3,3-dichloro-spiro-dinaphthosilane, 3-benzylspiro-dinaphthosilane, 3-methylnaphtho- (3-methoxy- Benzo) -spiropyran and the like can be used.

As specific developers, phenol resin compounds, salicylic acid metal chlorides, salicylic acid resin metal salt compounds, solid acid compounds, and the like can be used.
In addition, when encapsulating these color formers or developers in microcapsules, a method of dissolving the color former or developer in a high boiling point solvent and encapsulating in the microcapsules can be used. Examples of the high boiling point solvent include alkylnaphthalenes such as diisopropylnaphthalene, dialkylalkanes such as 1-phenyl-1-xylylethane, alkylbiphenyls such as dipropylbiphenyl, alkylbenzenes, benzylnaphthalenes, dialkylalkylenes, dioctyl maleate Such as carboxylic acid ester compounds such as tricresyl phosphate, vegetable oils such as castor oil, soybean oil and cottonseed oil, and boiling points of natural products such as mineral oil (consisting of aliphatic hydrocarbons) Is mentioned.

In the above-described impact recording sensor, a microcapsule made of melamine resin, urea resin, urethane resin, or gelatin can be used.
More specifically, the microcapsules include gelatin, a complex coacervation method using gum arabic, an interfacial polymerization method using a polyurethane urea resin film as an interface, a melamine-formalin resin, a urea-formalin resin, and the like. A film resin initial condensate can be added from the dispersion medium side to form a resin by an in situ polymerization method or the like. In particular, an in-situ polymerization method in which a film resin initial condensate such as a melamine-formalin resin, a urea-formalin resin or the like is added from the dispersion medium side to form a resin, a microcapsule having a high concentration is obtained. It is preferable because the particle size can be made relatively small.

Moreover, in the above-mentioned impact recording sensor, as a specific resin composition which becomes a matrix, depending on the purpose, a relatively hard one to a soft one can be arbitrarily used.
For example, hard materials include polyamide resin (PA), polytetrafluoroethylene resin (PTFE), polyacetal resin (POM), polyethylene terephthalate resin (PET), polybutylene terephthalate resin (PBT), polyether ether ketone resin ( PEEK), liquid crystal polymer resin (LCP), polyphenylene sulfide resin (PPS), polycarbonate resin (PC), polyphenylene oxide resin (PPO), and the like can be used.

  As the soft material, rubber or elastomer may be used as a resin composition, such as CPE (chlorinated polyethylene), EPDM (ethylene / propylene / diene monomer terpolymer), TPE (thermoplastic elastomer), liquid Silicone, silicone rubber, urethane rubber, or the like can be used.

  Moreover, in the above-described impact recording sensor, as the elastomer, a gel-like resin composition obtained by blending a liquid softening material with a base polymer can be used. The base polymer is arbitrary as long as it is a polymer that does not cause inconvenience in forming a gel-like resin material, but representative examples include various types of heat such as styrene, ester, amide, and urethane. Plastic elastomers and their hydrogenated and other modified products, or styrene, ABS, olefin, vinyl chloride, acrylate ester, methacrylate ester, carbonate, acetal, amide, halogen And thermoplastic resins such as halogenated polyether, halogenated olefin, cellulose, vinylidene, vinyl butyral, and alkylene oxide, and rubber-modified products of these resins. These may be used alone or in combination of two or more as long as they are compatible with each other.

As the liquid softening agent, any softening agent that does not cause inconvenience in finally forming the gel-like resin material may be used, and any hydrophilic or hydrophobic softening agent can be used.
As specific softeners, various softeners for rubber or resin such as mineral oil, vegetable oil, and synthetic can be used. Examples of mineral oils include paraffinic, naphthenic, and aromatic process oils, and vegetable oils include castor oil, cottonseed oil, linseed oil, rapeseed oil, soybean oil, palm oil, coconut oil, peanut oil, wood wax, Examples include pine oil and olive oil, and examples of the synthetic system include polyalphaolefin (PAO), liquid polybutene, and liquid polyisobutylene. These softeners may be used alone or in combination of two or more having good compatibility with each other.

  The blending ratio of the base polymer and the softening agent can be appropriately adjusted so as to obtain a desired hardness since the hardness of the gel-like resin material becomes lower as the amount of the softening agent increases. If an example is given about the combination of a base polymer and a softening agent, for example, it is preferable to use a styrene elastomer as the base polymer and a paraffin oil as the softening agent. As the styrene elastomer, styrene-ethylene-propylene-styrene elastomer, styrene-ethylene-butylene-styrene elastomer, styrene-ethylene-ethylene-propylene-styrene elastomer, styrene-isobutylene-styrene elastomer, or the like may be used. it can.

  Further, in the above-described impact recording sensor, the hardness of the pressure-sensitive member can be arbitrarily adjusted by selecting a base polymer and adjusting the composition. For example, by adjusting the pressure-sensitive member so that the hardness of the pressure-sensitive member is in the range of Asker FP hardness 20 to 95, the pressure-sensitive member can have very high shock-absorbing ability and vibration-proof characteristics.

(A) is a perspective view of the impact recording sensor described as the first embodiment, and (b) is a cross-sectional view of the impact recording sensor described as the first embodiment. (A) is a perspective view of the impact recording sensor described as the second embodiment, and (b) is a cross-sectional view of the impact recording sensor described as the second embodiment. It is a perspective view of the impact recording sensor demonstrated as a modification of 1st Embodiment.

Explanation of symbols

  10, 20, 30 ... impact recording sensor, 11 ... container, 13, 23 ... pressure sensitive member, 15, 25, 35 ... weight.

Claims (3)

A pressure-sensitive member made of a resin material in which at least one of a color former and a developer that develops color upon contact is enclosed in a microcapsule, and both are incorporated in a resin composition as a matrix;
When a shock is applied from the outside, the pressure sensitive member is moved relative to the pressure sensitive member to compress the pressure sensitive member, thereby destroying the microcapsules in the pressure sensitive member and coloring the pressure sensitive member. A weight and
The pressure-sensitive member is arranged at a position surrounding the periphery of the weight three-dimensionally, and the relative movement direction of the weight when receiving the impact is a displacement component in any of the orthogonal three-axis directions. Even if included, the pressure sensitive member is compressed by the weight. 2. The impact recording sensor according to claim 1, wherein the pressure-sensitive member has a light transmittance such that the colored state can be observed from the outside. In a form that covers the outside of the pressure-sensitive member, the pressure-sensitive member is provided with a light-transmitting container that can observe the colored state from the outside,
3. The impact recording sensor according to claim 1, wherein when receiving the impact, the pressure sensitive member is sandwiched between the container and the weight and compressed.

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